Swaging machine



' 7, 1942. J. B. TIEDEMANN SWAGING MACHINE Fiied Aug. 8, 1940 Julius B. Yzedemann INVENTQR. fwd

ATTORNEY.

Patented Apr. 7, 1942 SWAGING MACHINE Julius B. Tiedemann, Milwaukee, Wis., assignor to A. 0. Smith Corporation, Milwaukee, Wis., a corporation of New York Application August 8, 1940, Serial No. 351,881

7 Claims.

This invention relates to swaging machines and constitutes an improvement on the machine illustrated in my co-pending application, Serial No. 276,046, filed May 27, 1939, for Pipe swaging machine. This application is a continuation in part of said former application.

One of the objects of the invention is to provide shorter and more sturdy bearings for the crank shafts which drive the swaging dies.

Another object is to locate the cranks and links in a housing away from oil and dirt and spray which may be thrown from the dies in operation.

Another object is to provide a balancing of the load on the crank shaft to prevent undue stress of the same.

Another object is to provide a machine having greater access to the dies for changing dies and repair purpose.

Other objects will be set forth hereinafter in connection with the description of one embodiment of the invention illustrated in the accompanying drawing. 4 Y

In the drawing:

Figure 1 is a side elevation of the machine with parts broken away and in section and with parts shown dotted; and I Fig. 2 is an end elevation of the machine with parts broken away and in section.

The base I of the machine is suitably secured to a foundation 2 and has a. pair of side housings 3 extending upwardly for the full height of the machine. Each of the side housings comprises two relatively thick plates 4 and 5 disposed vertically in parallel spaced relation, and removable closure plates 6 joining the corresponding vertical edges of plates 4 and 5 to complete the closure. Top and bottom plates I are welded or otherwise secured to the vertical plates to hold the same in fixed position.

The vertical plates 4 and 5 of the two housings have lower alignedbearings 8' for receiving the lower crank shaft 9 and upper aligned bearings I0 for receiving the upper crank shaft II located vertically above the shaft 9 and parallel thereto. Gears I2 keyed to the ends of the shafts 9 and II provide a synchronous drive therefore from a suitable power source, not shown.

Flanged sleeves I3 enclose the central portions of shafts 9 and II and are bolted to the inner flanges of bearings 8 and I0 to protect the bearings from grit and to retain the lubricating oil.

The swaging dies I4 and I5 are located in the center of the machine one above the other, be-

tween the inner housing plates I, and have suitable curved recessed faces for receiving a pipe I6 fed horizontally to the machine between strokes of the dies. Each die has a trunnion I'I extending laterally from the sides near each end and through a slot I8 in the respective plate 4. There are four lateral trunnions for each die.

The upper shaft II has two pairs of eccentric cranks I9 located in the housings, the cranks of each pair extending in substantially opposite directions from the center of the shaft, andone of the cranks of each pair is connected to the respective rear trunnion ll of the upper die I4 by means of a link 20 while the other crank of each pair is connected to the respective forward trunnion ll of the upper die It by means 'of a link 2 I, so that the die I4 is suspended from the upper shaft II and its movement is prescribed by the cranks IS on that shaft.

Likewise, the lower shaft 9 has two eccentric cranks 22 located in each housing and connectd respectively to the rear and the forward trunnions ll of the lower die I5 by links 23 and 24, so that the die I5 is supported by the lower shaft 9 and its movement is prescribed by the cranks 22 on thatshaft.

The general movement and operation of the dies I4 and I5 is similar to that set forth in the co-pending application above referred to. In

order to more effectively control and synchronize the movement of the dies, the respective rear trunnions ll of the two dies are connected together and 'to the housings by links 25 which pivot on cross pins 26 extending between plates 4 and 5 of each housing in approximately the horizontal plane of the axis of the pipe I6.

getting into the links and bearings in the housings.

By locating the cranks and links in side housings the bearings for the shafts are disposed closer together and to the cranks so that there is less tendency for the shafts .to bend and produce inaccuracies in die movement, the cranks and links have their bearing surfaces protected from dirt and disposed for easy oiling, the oil for the moving drive parts is kept clean, the dies are left relatively open for ready repair and re placements of die segments, and the machine is more eflicient in its application of power and can be of lighter weight construction. Other advantages lie in the cheaper and simpler construction and assembly.

The cranks 19 are in pairs in each housing, and likewise cranks 22 are in pairs. The cranks of any one pair extend in opposite directions from the center of the shaft. Link joins one 7 crank I9 to the rear trunnion while link 2! of substantially the same length as link 20 joins the other crank l9 to the forward trunnion. The connections to the respective cranks are made to provide that during the working stroke l-he cranks are disposed on the same side of the shaft as the respective trunnion linked thereto. This provides for a transfer of stress as nearly vertical to the dies as possible and as the stroke progresses the static stress on the shaft at any, given time is as nearly balanced as possible. During the period of the working stroke when one link is stressed more than the other the more heavily stressed link is disposed more nearly in the direction of a line between the center of the shaft and the center of the trunnion to which the link is pivoted.

Various embodiments of the invention may be employed within the scope and intent of the invention as expressed in theaccompanying claims.

The invention is claimed as follows:

1. A swaging machine comprising a pair of reciprocating swaging dies, a housing disposed on each side of the dies and containing mechanism for operating the dies, means extending through slots in the housings for connectingsaid mechanism with the dies to drive the latter, and means moving with said last named means for closing said slots to prevent access of dirt and scale from the swaging operations to the mechanism in the housing.

2. A swaging machine comprising a pair of reciprocating swaging dies, a housing disposed on opposite sides of the dies, trunnions on the sides of the dies and extending into the hous-' ings through slots in the walls of the housing, a pair of crank shafts extending through each housing and having bearings in the walls of the housing and cranks disposed within the housing, links joining said cranks to the respective die trunnions in thehousing for operating the dies from the crank shafts, and means for driving said crank shafts in synchronism.

3. A swaging machine comprising a reciprocating rocking swaging die, a shaft having end bearings and disposed transversely of thedie, and a pair of links disposed in a housing on eachside of the die and connecting the opposite ends of the die to cranks on said shaft, the pairs of links being separated by said die to locate the cranks adjacent the end bearings for said shaft.

aavaoaa 4. A swaging machine comprising a reciprocating rocking swaging die, a shaft disposed transversely of the die, a-pair of links on each side of the die connecting the opposite ends thereof to cranks on said shaft, a housing on each side of said dies for enclosing said links and cranks, and bearings for said shaft disposed closely adjacent and on opposite sides of each pair of cranks.

5. A swaging machine comprising a base having two spaced upstanding housings between which the swaging dies are disposed one above the other, an upper crank shaft extendin through said housings abovethe dies and a lower crank shaft extending through said housings below the dies, bearings for said shafts in the opposite walls of each housing, side trunnions on said dies at each end extending through slots into said housings, a pair of cranks on each shaft in eachhousing, links joining the cranks on the upper shaft to respective die trunnions of the upper'die, and links joining the cranks on the lower shaft to respective die trunnions of the lower die.

6. 'A swaging machine comprising a base having two spaced upstanding housings between which the swaging dies are disposed one above the other, an upper crank shaft extending through said housings above the dies and a lower crank shaft extending through saidhousings below the dies, bearings for said shafts in the opposite walls of each housingyside trunnions on said dies at each end' extending through slots into said housings, apair of cranks on each shaft in each housing, links joining the cranks on the upper shaft to respective die trunnions of the upper die,links joining the cranks on the lower shaft to respective die trunnions of the lower die, and means for closing said slots against access of dirt from the swaging operations to themechanism in the housings. v

7; In a swaging machine, a swaging die disposed for reciprocatory rocking and orbit movement,-a'rotary crank shaft disposed transversely of the die for operating the same and having a pair of cranks thereon extending in substantially opposite directions from the center of the crank shaft, means connecting said cranks to opposite ends of the die and of substantially equal length to provide a working stroke for the die in which the cranks are on the same side of the shaft as the respective ends of the die to which they are linked, and in which each link extends in substantially the plane of the shaft and of the connection to the die during the period of maximum load thereon.

JULIUS B. TIEDEMANN. 

